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H. H DODGE. REGULATOR FOR GAS BURNERS, &c.

No. 30,470. Patented 00p. 23, 1860 UNITED STATES PA TENT OFFICE.

HENRY H. DODGE, OF GEORGELO\VN, DlSlltlUT OF COLUMBIA.

GAS-BURNER.

Specification of Letters Patent No. 30,470, dated October 23, 1860.

To all whom it may concern:

Be it known that I, HENRY H. Donor, of Georgetown, District of Columbia, have invented a certain new and useful Improvement in Apparatus for Regulating the Pressure and Flow of Gas to the Burner, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing of the same, making part of this specification, in which Figure 1 represents an elevation of a gas burner having my improvement applied thereto; Fig. 2, a vertical section ofthe same, and Fig. 3, an elevation of the several parts of the apparatus, constituting the regulator, detached from the shell of the gas burner, Fig. 1; Fig. at, represents an elevation of a modification of any regulator, detached from the shell; Fig. 5, a vertical section of the same as inclosed in the shell of the burner; Fig. 6, represents an elevation of the same modification, but only relatively smaller with regard to the shell than the former so as to make a larger chamber in the shell of the burner for the expansion of the gas; and Fig. 7, a vertical section of it, as inclosed in the shell. Fig. 8 represents a vertical section of another modification in which the cap and seat is made conical to compensate for great pressure.

In practice, it has been found that the pressure of the gas througl'i the burners, from various causes, here unnecessary to mention, constantly fluctuates and varies, which is, at once, injurious to the eyesight of the parties using it, and the source or cause of great waste of gas. To remedy these defects has been an object of paramount importance to all consumers for many years, for which purpose many inventions and improvements have been made and multiplied with more or less success, but as yet none has effectually accomplished it. )Vith this object in view and after many experiments, I find that the only true way to effect it, is to make the pressure of the gas regulate the quantity of gas allowed to flow to the burner, so that, where the pressure is very great, the volume allowed to pass, will be small and vice versa.

My invention consists in an improved apparatus for this purpose, which, with slight modifications, may either be applied directly to each gas burner or to the service pipe after it has passed through the meter.

To enable others skilled in the art, to

make, construct and use my invention, I will now proceed to describe my improved apparatus in detail, here premising that it is represented applied to a gas burner.

In the drawing Fig. 1, the tip (A) is represented as being screwed into a collar (B) of a burner, which, in turn, is screwed into the upper end of the cylindrical shell (C) of the gas burner. Into the lower end of the shell is screwed the cylinder (D) forming part of the regulator, 011 the upper end of which is formed the shoulder (a) on which rests the cylinder having a rectangular opening (6) cut in its side, of capacity about equal to the opening of the tip. )Vithin this cylinder (E) and resting on the top (cl) of the cylinder (D) is fitted another cylinder (F) in such manner as to allow it to slide free y up and down within the cylinder (E), yet tight enough to prevent the flow of gas between it and the outer one. This cylinder (F) is close at the top (like cylinder and contains a rectangular or other shaped opening (0) for the passage of the gas from its interior through the opening in the outer cylinder into the chamber formed by the space between the shell (C) and the outer cylinder (E). The cylinder being made smaller for this purpose than the interior of the shell, this chamber forming the supply chamber of the tip the openings (0 and b) are of the same height and placed at equal distances above the top of the cylinder (D) so that they cover each other, whenever the cylinder (F) rests on (d) the opening (0) is made longer than (1)), as seen in (Fig. 3F) in order to insure its covering opening (6) should the cylinder (F) accidentally turn a. little.

The operation is as follows: The gas being turned on, the space (8) is filled with it under the then existing pressure in the main pipe; if this pressure is such as to yield the desired flame, the cylinder (F) will continue to rest on (D) (its weight be ing adjusted to that effect) and the openings (0 and 2)) covering each other, will allow the full flow of the gas. If the pressure reaches a certain limit, it will overcome the weight of cylinder (F) in acting against its top and lift it until it is prevented from going any farther by stop placed within (E) and at such a height as to allow a suflicient escape of gas to the thus reduced opening If the pressure is between these two possible extremes it will lift the cylinder (F) to that height which establishes equilibrium between the pressure of the gas in (S) and the weight of (F) combined with the increased pressure of the condensed medium within the now smaller space and thereby decreasing the opening (6) in proportion. If the cylinder (F) is not made to fit tight enough to prevent the flow of gas between, a hole may be cut in the top of (E) to allow the gas accumulated in (m) to escape, as it would otherwise be apt to counteract the pressure of the gas in (S) the action of the elasticity of the air may in this case be replaced by spiral spring fastened to the top of (F) and acting upon the bottom and made to slide tightly over cylinder (M) which latter is also closed at the bottom and contains opening (6).

The seat (g) is furnished with two or more projections which prevent the cylinder (F) from closing entirely the passage of the The cylinder (F) Fig. 4:, is closed at gas from (H) to the regulator space (N N). Should the pressure in (H) be within the proper limits to allow a suflicient flow of gas from (N) to (b) if the pressure is too great, and will lift the cylinder (F) thereby decreasing the opening (12), the principle of the action being the same as above stated,

' HENRY H. DODGE.

lVitnesses:

F. EMAILLE, JOHN P. Jacons. 

